Radio receiving unit



Sept. 14 1926. 1,599,657

I B. w. DAVID mnro macmvms um Filed March 18, 1 922 2 Sheets-Sheet 1 k 3 w k I o o o o 'INVENTOR.

Sept. 14,1926. 13599557 B. W. DAVID RADIO RECEIVING UNIT 7 Filed March 18, 1922 2 Sheets-Sheet 2 N N-INPR I'NVENTOR.

Patented Sept. 14, 1926.

I UNITED STATES rare FEQE.

RADIO RECEIVING UNIT.

Application filed March 18, 1922. Serial No. 544,836.

My invention relates to improvements in radio receiving units, and has for its object the provision of a compact, convenient and properly arranged grouping of radio receiving apparatus directly associated with any suitable audion or vacuum tube, which will secure maximum efficiency and afford the greatest convenience in mounting and electrically connecting such apparatus.

At the present time such coacting radio receiving appliances are separately constructed and are mounted in cabinets, on shelves or upon panels in accordance with no particular plan or system; sometimes in such relation as to involve more or'less interference, and commonly with a complexity of circuit connections that may confuse the amateur operator. These conditions have been successfully met inthe construction of my improved unit, adapted to be associated with a suitable audion, as herein disclosed.

The typical apparatus which I have devised comprises a correctly related and standard connected assembly of a rhcostat, audion receptacle amplifying transformer and telephone jack, together with a convenient, rigid supporting frame therefor and an insulating support for the respective terminals. The structural features and advan tages of my improved unit may best be ere plained by making reference to the accompanying drawings, wherein:

Figure 1 is a view of the complete unit in side elevation.

Fig. 2 is a view thereof in rear elevation.

Fig. 3 is a fragmentary view illustrating a modification including a condenser mounting, and

Fig. 4 is a, view, partially diagrammatic in character, illustrating the connection of three of the radio receiving units with their associated audions, adapted for two stages of amplification.

Throughout the several figures of the drawings I have employed the same character of reference to indicate similar parts.

'Referring first to Fig. 1, it will be noted that a rigid and simple modified L-frame a is provided in the metal strap which is rectangularly bent to afiord front and rear supports a, at, and a horizontal support 01. The connecting telephone jack Z) is mounted upon an insulating block at the base of the L-frame, while its bushing Z), which is adapted to be screwed into the upright a, serves to mount the lower portion of the frame upon the supporting panel. A screw 0, which is concealed by the dial (5 of the rheostat (Z, serves to connect the upper portion of frame Ciwith said panel 6.

This rheostat (Z is attached to the upper por tion of the upright member a and the rotatable knob and dial d areconnected to rotate the contact arm d" (Fig. 2). Ftearwardly of the rheostat (Z there is positioned the socket f for. receiving the audion bulb, which socket is mounted upon the upper face of the horizontal member a of the frame by means of its insulating support 7. Mounted upon the lower face of member of is amplifying transformer g positioned directly beneath the socket f and in such relation thereto as to avoid interference in receiving through the associated audion bulb (not shown in Figs. 1 and 2 for lack of space). However, the diagrammatic showing of Fig. 4t illustrates these audion bulbs i in position within their respective sockets and indicates their non-interfering relation with their respective transformers and associated transformers of the complete receiving set.

Aninsulating plate 2' is secured rearwardly of member a of the frame and mounts a series of .paired terminals t1, 71, etc. The connections of these terminals to the several appliances of the receiving unit are shown in Fig. 1, while the connections from unit to unit are diagrammatically indicated in Fig. 4 by the bus wires :7' j and j*, eX- tending from unit to unit of the three units comprising the set. From the foregoing it will be readily understood that it is practically impossible for the beginner or amateur to make a misconnection in setting up and connecting these units, which preferably are mounted side by side on a suitable panel (not shown). The number of suchunits may be varied as desired.

A modification is illustrated in Fig. 8, which discloses a unit equipped with a condense-r 7c in lieu of the amplifying transformer found in the unit of Fig. 1; which modification is well adapted for the first unitof a set of receiving units such as shown in Fig. 4. It will be observed that the same compact arrangement and standardization of electrical connections with attendant convenience in mounting and use, obtain with respect to this modification, as previously described above. This and analogous changes may be made in the particular apparatus and arrangement specifically shown iii and described without departing from the spirit of my invention. In other words, the present invention is not concerned with the structural details of the coac-ting appliances combined to form the efiieient and convenient 'adio receiving unit herein disclosed, hence the claims contemplate the substitution of equivalent apparatus, except as specicircuit of Fig. l, but these form no part of my invention and require no detailed description herein.

Having now described apparatus embodying my invention, 1 claim as new and desire to secure by Letters Patent the following:

1. As a new article of inainifacture, a radio receiving unit comprising receiving and regulating appliances, and a connecting jack therefor, a frame rigidly mounting said elements, and means, including the bushing of said jack, for connecting the unit upon a mounting panel, substantially as set forth.

2. As a new article of manufacture, a radio receiving unit comprising an L-frame, an audion receptacle and its associated receivingappliance, and a connecting acl; re spectively mounted horizontally upon said frame in spaced relation, a rheostat mounted forwardly of the frame and a terminal-supporting insulating member mounted rearwardly of said frame; all permanently mounted thereon and electrically connected, substantially as set forth.

3. As a new article of manufacture, a radio receiving unit comprising a supporting frame, an audion socket, its transformer, a rheostat and a jack; all permanently mounted upon said frame, and means, including the bushing of said jack, for mounting the frame in operative position, substantially as set forth.

4. As a new article of manufacture, a radio receiving unit comprising a rigid metallic L-frame, an audion receptacle and its associated receiving appliance mounted in substantially non-interfering relation upon the horizontal portion of said frame, a. connecting jack positioned forwardly of the frame, including a bushing adapted to support the unit in operative position, and a terminalsupporting member mounted rearwardly of the frame with its terminals in predetermined accessible relation, substantially as set forth.

5. As a new article of manufacture, a radio receiving unit compactly mounted in vertical relation as to its component members; comprising a rigid metallic frame, a jack and its bushing affording mounting means for said unit, an au'dion receptacle, a subjacent amplifying transformer, a rheostat, and a terminal-supporting member; all mounted as a unitary structure upon the frame and adapted to be positioned upon a supporting panel, substantially as set forth.

6. As a new article of manufacture, a radio receiving unit comprising an l..-shaped metallic frame, a rheostat and a jack-bushing forwardly positioned upon said frame; the latter screwing into the frame to form its support, a jack, an amplifying transformer and an audion receptacle mounted one below the other upon the horizontal portion of the frame, and a rearward terminalsupporting member connected with the respective elements, substantially as set forth.

In testimony whereof I do now aflix my signature.

BRUCE WV. DAVID. 

